Fuse-carrier.



W. A. HARVEY.

FUSE CARRIER.

APPLICATION HLED OCT. 3, m2.

1 .2 1 8. 5 5 3 Patented Mar. (3, 1917.

yaw names WILLIAM A. HARVEY, OF SCRANTON, PENNSYLVANIA.

FUSE-CARRIER.

Specification of Letters Patent.

Patented Mar. 6, 1917.

Application filed October 3, 1912. Serial No. 723,739.

To all whom it may concern:

Be it known that I, \VILLIAM A. HARVEY, a citizen of the United States, and a resident of Scranton, in the county of Lackawanna and State of Pennsylvania, have invented a certain new and useful l use-carrier, of which the following is a specification.

This invention relates to fuses to be introduced into electric circuits for protection of electrical apparatus supplied thereby, and has for its object, primarily, to provide means whereby a plug fuse may be conveniently and effectivelyapplied to an electrical fixture primarily intended for cartridge fuses and thereby introduced in circuit. In general the invention employs a fuse carrier in the nature of a mounting, which is provided on the one hand with terminals having peculiarities of position and construction adapting them to the peculiar conditions of the existing electrical fixture, and on the other hand with terminals haw ing the peculiarities of position or construction, or both, adapting the mounting to receive the particular fuse which it is desired to substitute.

The nature of the invention will be more fully understood from the following description of an illustrative embodiment thereof, reference being had to the accompanying drawing, in which Figure'l is a plan view of an embodiment adapted to receive a plug fuse.

Fig. 2 is a vertical longitudinal section of Fig. 1 showing the fuse in place.

Fig. 3 is a detail view of a part of Figs. 1 and 2. 4

WVhen a fuse is blown by an overload on a line, it is frequently necessary to again establish the circuit by the introduction of a new fuse in order to test the line to locate the short circuit or other cause of trouble. It frequently happens that several fuses will be introduced and repeatedly blown or destroyed in such a test. Fuses of the cartridge type for which many existing fixtures are especially equipped, are quite expensive, so that it frequently happens that several dollars worth of fuses are consumed in merely locating the trouble on the circuit. It also frequently happens that fuses conforming to the more or less arbitrarily established standards of form are not in hand or readily obtainable when an existing highpriced fuse has been consumed. Again, there are many places where a less expensive fuse can be utilized, and it may frequently become desirable to substitute a certain preferred type of fuse upon an existing fixture originally designed for a totally different type of fuse. Moreover, there are many instances where it is desirable to overload a circuit within certain limits for emergencies or for the purpose of introducing translating devices in addition to those permitted to be operated by the particular fuse for which the fixture was originally designed, and in these cases it becomes desirable to introducea fuse of somewhat larger capacity than will be received bv the original fixture. There are also circumstances under which it may be desirable to introduce a fuse of less capacity than that for which the original fixture was intended. The present invention, therefore, consists primarily in providing a carrier 5 of suitable form, equipped with fuse terminals adapted to receive a fuse of the particular type or capacity desired to be substituted in the circuit and also provided with contacts 7- having the peculiarities of design adapting them to be introduced into electrical connection with the fuse terminals on the fixture. In the embodiment selected for illustration, the carrier 5 is in the form of an elongated body of fiber or non-conducting material, while the fuses illustrated as being substituted, are in the form of a plug 21.

The preferred embodiment of my invention consists in providing a threaded shell terminal 19 to receive the outer cylindrical contact 20 of the fuse 21 and a central terminal 22 to receive the central contact 23 of said fuse. For effectively connecting these carrier .fuse terminals 19 and 22 with the carrier contacts 7, I prefer to employ an elevated insulating plate 24 su 'iported on the carrier body 5 by the spacers and screws 12 and carrying upon the upper surface the combined yoke and tongue 26, which receives the shell contact 19; said plate 24; also carrying upon its under side the connector 27 which extends from the central terminal 22 to the other screw 12, through which it is connected with a contact- 7. The outer end of the connector 27 is turned up so as to embrace the insulating plate Qel to assist in holding the connector in position.

I claim A fuse carrier for introducing electrical fuses between the terminals on existing eleccontact being located beneath the insulating plate, while the connection between the other terminal and its corresponding contact is located above said plate.

The foregoing specification signed at E'SCYrant-on, Penna, this twelfth (lay of September, 191.2.

WILLIAM A. HARVEY.

In presence of two witnesses:

JAMES Morn, lVM. M. HAMLIN.

Pel -ME 

